Abstract
The nature of the fluid–loading on a line–driven elastic plate significantly affects the structural and acoustic responses. As the fluid–loading increases, the fluid–structure interaction affects the wave propagation in the structure, as well as both the level and directivity of the sound radiation from the structure into the fluid field. The structural and acoustic responses of a line–force driven infinite plate under various fluid–loading conditions are considered. A detailed understanding of the fluid–structure interaction, including the effects of both heavy and light fluid–loading on the radiated sound pressure, sound power and structural response are clearly illustrated by numerical examples using the exact solution of the system equations. The results from this analysis of the physical system also provide useful information for the design of an active control system to effectively reduce the structural and acoustic responses of the fluid–loaded plate.
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